I noticed that jquery\'s beta template plugin is using, the type attribute \"text/x-jquery-tmpl\"
e.g
The type actually does indicate what sort of script is there. If the browser doesn't understand it, it should ignore it. In this case, it's a convenient and semantic sort of way to include the source of the template without displaying it on the screen.
Usually with jquery template, you'll give it an id and refer to it that way with your $(id).tmpl call.
script def here: http://www.w3.org/TR/html401/interact/scripts.html#idx-scripting_language
examples of tmpl here: http://api.jquery.com/tmpl/